US3210041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic actuator
Assignee: Robertshaw Controls Co
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Filing: 1962-07-30
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Granted: 1965-10-05
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Richard K Mitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:58
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14; F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/10; H01F7/121; H01F7/123
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
IN AN ELECTROMAGNETICALLY OPERATED DEVICE, THE COMBINATION COMPRISING A BI-POLAR MAGNET CORE, AN ELECTRICALLY ENERGIZABLE COIL ASSOCIATED WITH ONE POLE OF SAID MAGNET CORE, A KEEPER PIVOTALLY MOUNTED INTERMEDIATE ITS ENDS ON SAID ONE POLE, ONE END OF SAID KEEPER BEING DISPOSED FOR ATTRACTION TO THE OTHER POLE OF SAID MAGNET CORE UPON ENERGIZATION OF SAID COIL, THE OTHER POLE OF SAID MAGNET CORE HAVING AN ENLARGED FACE FOR INCREASING FLUX TO SAID ONE END OF SAID KEEPER, SPRING MEANS BIASING SAID ONE END OF SAID KEEPER AWAY FROM SAID OTHER POLE UPON DEENERGIZATION OF SAID COIL, ELECTRIC CIRCUIT MEANS FOR ENERGIZING SAID COIL INCLUDING AN ALTERNATING CURRENT TRANSFORMER AND A RECTIFIER TO CHANGE THE ALTERNATING CURRENT TO PLUSATING DIRECT CURRENT, AND A LAG COIL ON SAID ONE POLE OF SAID MAGNET CORE AND BEING RESPONSIVE TO SAID ELECTRIC COIL TO RETARD DEMAGNETIZATION ON PULSATION DECAY.
References Cited (Backward Citations)
US2322911A
Cited
US2850258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |